Reddit is a strange site to try and quantify. While, on the surface, it may look like a simple message board, there's quite a bit more to it. There's a subreddit for just about anything — both good and bad.
As such, it's almost impossible to predict where the site is going. What could be huge one day could be buried the next and vice-versa, regardless of its actual quality — when that many people get together at the same time and start talking about the same things, there's no telling where anything will go.
Despite this, one Redditor has taken it upon himself to try and predict what Reddit will look like 1,000 years in the future. Appropriately titled "Reddit 3016," the fake message board is the work of one Blair Erickson, and reportedly took upwards of two years to build. If you thought that this is some lame Photoshop project, think again: Reddit 3016 is basically a working replica of the real thing, complete with (fake) image hosting and articles:
Sadly, it doesn't seem like Erickson is all that happy with the site he's parodying: the second link on Reddit 3016 is actually a link to a real Reddit post in which Erickson blasts the site moderators for removing any links to Reddit 3016 from the site. Why exactly Erickson's work was removed has yet to be revealed, but it's hard to see why Reddit 3016 would be pulled from the source of its inspiration.
If you want to see more of Erickson's work for yourself, just head on over to Reddit 3016.